jan-cli 0.16.0

YAML-defined CLI trees with progressive help, optional exec aliases, merged extra specs, and SQLite audit logging keyed by git branch
Documentation 
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# `jan alias`

Emit shell aliases for executable `run` leaves (assumes `jan use` is already configured).

```bash
jan alias
jan alias --shell zsh -o ~/.config/jan/scripts/aliases.zsh
```

| Flag | Description |
|------|-------------|
| `--jan-bin` | Program name on the RHS (default: `jan`) |
| `--shell` | Header dialect: `sh`, `bash`, or `zsh` |
| `-o` | Write to a file instead of stdout |

Example line:

```bash
alias sum='jan scripts misc sum run'
```

Alias generation rejects names outside `[A-Za-z_][A-Za-z0-9_-]*` and shell-quotes every generated command argument independently (including `--jan-bin` and each chain segment).

Declare extra aliases on any command node with `aliases:`:

```yaml
# Extra jan names (same chain as this node's `run` or leaf exec)
last_branch:
  aliases: [lb]
  commands:
    run:
      exec:
        bash: |
          git branch --sort=committerdate

# Traditional shell aliases
git:
  aliases:
    g: git
    gs: git status
    lb:            # empty RHS = extra jan name (if this node is a jan target)
```

`jan alias` prints jan command aliases first, then a `# shell aliases from spec` section. If a shell alias name is already a jan command alias, it is skipped with a comment. Unsafe names fail at spec load (`jan validate`).